Resident Ruth Williamson said: “There was an explosion just before 7am this morning. My windows didn’t shake but I imagine the flats right outside the explosion did.

“It was definitely an explosion, controlled. I have two children and they were both terrified, especially when I couldn’t tell them what was happening.”

Another neighbour said: “I first noticed something was going on at about 7pm last night when I got dropped off home. From then there was just lots of police, ambulances and fire engines then the two or three bomb disposal vans.

“They were connecting fire hoses to the drains the about 6.50am there was a really loud bang. I didn’t see any one get evacuated. I was so scared and it put me into complete panic.”

Superintendent Graeme Murdoch, Head of Operations, Tayside Division, said “We understand that it is always concerning for the community when there is this level of Police activity, and we require the advice and services of our EOD colleagues.

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“However, public safety remains our highest priority, and in this case, that has been no different, and we have tried to balance this with the impact on local residents.

“I would seek to reassure all residents in Fairbairn Street and the immediate vicinity that there is no ongoing threat to their safety.

“I can now confirm that following a full search we are satisfied that the property concerned is completely safe, and we are in the process of advising affected residents that they are free to return to their homes.”